<template>
	<div>
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>权限管理</el-breadcrumb-item>
			<el-breadcrumb-item>角色列表</el-breadcrumb-item>
		</el-breadcrumb>
		
		<el-card>
			<el-row>
				<el-col>
					<el-button>添加角色</el-button>
				</el-col>
			</el-row>
			
			<el-table :data="rolelist" border stripe>
				<!-- 展开列 -->
				<el-table-column type="expand">
					<template v-slot="scope">
						<el-row :class="['vcenter','bdbottom',i1 === 0 ? 'bdtop':'']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
							<!-- 渲染一级权限 -->
							<el-col :span="5">
								<el-tag @close="removeRightById(scope.row,item1.id)" closable>{{item1.authName}}</el-tag>
								<!-- 小箭头 -->
								<i class="el-icon-caret-right"></i>
							</el-col>
							<!-- 渲染二级和三级权限 -->
							<el-col :span="19">
								
								<el-row :class="['vcenter',i2 === 0 ? '' :'bdtop']" v-for="(item2,i2) in item1.children" :key="item2.id">
									<!-- 渲染二级 -->
									<el-col :span="6">
										<el-tag @close="removeRightById(scope.row,item2.id)" closable type="success">
											{{item2.authName}}
										</el-tag>
										<!-- 小箭头 -->
										<i class="el-icon-caret-right"></i>
									</el-col>
									<!-- 渲染三级 -->
									<el-col :span="18">
										<el-tag @close="removeRightById(scope.row,item3.id)" closable type="warning" v-for="(item3, i3) in item2.children" :key="item3.id">{{item3.authName}}</el-tag>
									</el-col>
								</el-row>
							</el-col>
						</el-row>
						<!-- <pre>
							{{scope.row}}
						</pre> -->
						
					</template>
				</el-table-column>
				<!-- 索引列 -->
				<el-table-column type="index"></el-table-column>
				<el-table-column label="角色名称" prop="roleName"></el-table-column>
				<el-table-column label="角色描述" prop="roleDesc"></el-table-column>
				<el-table-column label="操作" width="300px">
					<template slot-scope="scope">
							<el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
							<el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
							<el-button @click="showSetRightDialog(scope.row)" size="mini" type="warning" icon="el-icon-setting">分配权限</el-button>
						
					</template>
				</el-table-column>

			</el-table>
		</el-card>
		
		<!-- 分配权限的对话框 -->
		<el-dialog
		@close="setRightDialogClosed"
		  title="分配权限"
		  :visible.sync="setRightDialogdialogVisible"
		  width="30%">
			<!-- 树形控件 -->
		  <el-tree
			ref="treeRef"
			default-expand-all
			 :default-checked-keys="defKeys"
				node-key="id"
				show-checkbox
				:data="rightslist"
		    :props="treeProps"
		    >
		  </el-tree>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="setRightDialogdialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="allotRights">确 定</el-button>
		  </span>
		</el-dialog>
	</div>
</template>

<script>
	export default {
		data(){
			return {
				rolelist:[],
				setRightDialogdialogVisible:false,
				rightslist:[],
				//属性空间的属性绑定对象
				treeProps: {
          label: 'authName',
					children: 'children'
        },
				//默认选中的节点Id值数组
				defKeys: [],
				roleId:''
			}
		},
		created(){
			this.getRolesList()
		},
		methods:{
			async getRolesList(){
				const {
					data: res
				} = await this.$http.get('roles')
				if (res.meta.status !== 200) {
					this.$message.error('获取角色列表失败')
				}
				this.rolelist = res.data
			},
			//根据id删除对象的权限
			async removeRightById(role,rightId){
				//弹窗确认
				const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
					confirmButtonText: '确定',
					cancelButtonText: '取消',
					type: 'warning'
				}).catch(err => err)
				if(confirmResult !== 'confirm'){
					return this.$message.info('取消了删除')
				}
				const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
				if(res.meta.status !== 200){
					return this.$message.error('删除权限失败')
				}
				role.children = res.data
			},
			async showSetRightDialog(role){
				this.roleId = role.id
				//获取所有权限数据
				const {data:res} = await this.$http.get('rights/tree')
				console.log('权限树',res);
				if(res.meta.status !== 200){
					return this.$message.error('获取权限树失败')
				}
				this.rightslist = res.data
				this.getLeafKeys(role,this.defKeys)
				//递归获取选中三级节点的id
				
				this.setRightDialogdialogVisible = true
			},
			// 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys
			getLeafKeys(node,arr){
				//如果当前node节点不包含children属性，则是三级节点
				if (!node.children) {
					return arr.push(node.id)
				}
				node.children.forEach((item) => {
					this.getLeafKeys(item,arr)
				})
			},
			//
			setRightDialogClosed(){
				this.defKeys = []
			},
			//
			async allotRights(){
				const keys = [
					...this.$refs.treeRef.getCheckedKeys(),
					...this.$refs.treeRef.getHalfCheckedKeys()
				]
				const idStr = keys.join(',')
				const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
				if(res.meta.status !== 200){
					return this.$message.error('分配权限失败')
				}
				this.$message.success('分配权限成功')
				this.getRolesList()
				this.setRightDialogdialogVisible = false
			}
		}
	}
</script>

<style lang="less" scoped>
.el-tag{
	margin: 7px;
}
.bdtop{
	border-top: 1px solid #eee;
}
.bdbottom{
	border-bottom: 1px solid #eee;
}
.vcenter{
	display: flex;
	align-items: center;
}
</style>
